Thank you for the question.
Microplastic pollution is an emerging topic. We're still, I think, in a learning phase. I gave an example that much of the research to date has carried out sampling and analysis using different methods, which we can't really compare, so we really don't have a good understanding of the situation.
I know there's been another committee in terms of microplastics, but I think we need some understanding of a coordinated sampling approach across jurisdictions so we can have an understanding of the scale of the problem. Of course, there's interest in terms of nanoplastics as well.
In terms of pollutants, I think that to some extent it's quite simple. If we can understand the sources, we can manage those sources and help to reduce the problem. Therefore, if single-use plastics are a source, then perhaps we should manage that source.
It's also worth recognizing that microplastics in the environment today are plastics that degraded 20 to 50 years ago and were released into the environment, so there's been that slow breakdown. Therefore, we expect to see an exponential increase in microplastics in the environment, given the fact that there's been an exponential increase in the use of plastics over the past 20 to 50 years.
I think we're at the tip of the iceberg in terms of what we're seeing and in terms of microplastics in the environment, so what we do today may have an impact in 50 years' time.